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. May 26, 1931. R. NELSON SOLDERING PLIERS Filed April 25, 1929 INVENTOR. fig M2603.

TTORNEIY.

Patented May 26, 1931 BOY NELSON, bl mom, NORTH DAKOTA SOLDEBING P141138 Application filed A ril as,

use by electricians in radio work, automobile mechanics and jewelers, the present device being distinguished from the ordinary soldering iron by the provision of a pair of carbon contacts through which electricity is flowed in forming a soldering operation.

The primary object of the invention is to provide a pair of solderin pliers comprismg a pair of pivoted crossandles insulated from each other with an electric conductor connected to each handle while the gripping aw ends of the soldering pliers carry caron blocks adapted for engagement with the object to be soldered and through which electricity is flowed.

29 With the above and other objects that will 7 ment of become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arran earts hereinafter more fully eraw- scribed, s own in the acocmpanying ings and claimed.

In the drawings Figure 1 is a side elevational view of a pair of soldering pliers constructed in accordance with the present invention;

Figure 2 is an edge elevational view of the pliers;

Figure 3 is a detail sectional view taken on line 3-3 of Figure 1 showing the carbon blocks or tips at the jaw ends of the pliers to engage the work;

Figure 4 is a detail sectional view taken on line44 of Figure 1 showing the insulated pivotal connection between the pliers;

Figure 5 is a detail sectional view taken on line 55 of Figure 1 showing the insula tion handle grip and separating spring between the handles; and

' Figure 6 is a detail sectional view taken on line 66 of Figure 1 showing the electric conductors anchored to the plier handles and covered b the insulation grips.

The so dering pliers comprises a pair of cross handles 1 pivoted to ether y the o screw 2 affording handle grip ends 3 and 1089. lerlal I0. 358,094.

jaw-ends 4. An insulation connection is formed between the pivot points of the handles 1 as shown in Figure 4, aninsulation washer 4 se arating the handles 1 while an insulation (118k 5 is set into each handle with the pivot screw 2 passing through the washer and disk.

' The outer ends of the jaw ends 4 of the pliers are sprocketed as at 6 for the reception of insulation tips or blocks 7 that ma assume and configuration desired, one bloc 7 as shown in Figure 3 havin a flat end wall while the cooperating car on block 7 is of conical formation to provide a point contact.

Each grip ing end 3 of the plier handles 1 is provide with an insulation covering 8 terminating at points s aced from the pivot pin 2 with opposed soc ets 9 on the handle coverings 8 to receive the ends of a coil sprin 9 tending to separate the gripping hand es 3 and open the jaw ends 4. A pair of electric conductors 11 are electrically connected as at 12 to the outer ends of the handle ips- 3 with the insulation covering over ying the connection.

W'th electric current flowing from a suitablesource through the conductors 11 to the handles 1, the two carbon points are closed upon the object to be soldered and sufiicient heat is generated instantly to melt the solder when the carbon points are brought together. By providing both points of the pliers with a carbon block 7, all liability of the object being soldered adheri to the pliers is eliminated as the carbon locks 7 leave the soldered joints in a clean condition, which would not occur if metallic points were employed. Also, the carbon blocks 7 may be maintained in engagement with the object being soldered and the su ply of electricity cut off, the carbon blocks then acting as a clamping device for holdin the joints until the solder has become har ened or set. A clip may be attached to each end of the two conductors 11 and secured to the terminals of a radio or automobile battery and the pliers used in repair work on the automobile and in connection with a radio. apparatus. The portability of the device ermits its use in various places of a confined nature, web as at points rearwardly of the instrument board or the like and will efficiently accomplish all objects ascribed thereto. The pliers may be suitably supported upon a workmans bench, such as for jewelry work and operated by pedal mechanism, leaving both hands free for the manipulation of the devices being worked upon.

The device is extremely simple in construction and operation, no adjustment of the parts being required, while no switches are employed in the operation, the moving of the carbon blocks together effecting the heating thereof and the flow of current.

\Vhile there is herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

I claim I 1. In a device of the class described, a pair of pivotally connected pliers, comprising jaws and operating arms, means for supplying electricity to the pivoted arms of the I pliers comprising leads connected to the ends of the handles of the pliers, carbon points on the soldering ends of the pliers, insulation hand grips on the handles of the' liers, and a compression spring between tie insulation grips normally to separate the carbon points.

2. In a device of the class described, a pair df pivotally connected pliers, comprising jaws and operating arms, means for supply r ing electricity to the pivoted arms of the pliers comprising leads attached to the handle ends of the pliers, aninsulation bearing separating the arms of the pliers at the pivot joint, insulation hand grips on the handles of the pliers extending beyond the ends thereof and a compression spring between the insulation grips normally to separate the carbon points.

In testimony whereof I afiix my signature.

ROY NELSON. 

